Looking into Dog Sled/Heli excursion. Looking at 2 companies. Temsco/Alaska Ice Expeditions or Shoretrips. Any preferences? What I have learned is...One goes to Mendenhall Glacier the later goes to Hebert Glacier. The first is a larger (more crowded) company, the other smaller (less crowded) co. Wondering if Sledding on mendenhall is a must, or if flying over it is okay (both do that). Any help you can give is appreciated. Also, if you recommend another company all together, please advise that too. Thanks.